Configuring Bgp Route Aggregation - Huawei S6700 Series Configuration Manual

S6700 Series Ethernet Switches
Configuration Guide - IP Routing
l
l
l
----End

7.7 Configuring BGP Route Aggregation

Configuring BGP Route Aggregation on a device can reduce the sizes of routing tables on the
peers of the device.
Applicable Environment
The BGP routing table of a device on a medium or large BGP network contains a large number
of routing entries. Storing the routing table consumes a large number of memory resources, and
transmitting and processing routing information consume lots of network resources. Configuring
route aggregation can reduce the size of a routing table, prevent specific routes from being
advertised, and minimize the impact of route flapping on network performance. BGP route
aggregation and routing policies enable BGP to effectively transmit and control routes.
BGP supports automatic and manual aggregation. Manual aggregation takes precedence over
automatic aggregation.
Pre-configuration Tasks
Before configuring BGP route aggregation, complete the following task:
l
Procedure
l
Issue 01 (2012-03-15)
Run the display bgp routing-table community-filter { { community-filter-name | basic-
community-filter-number } [ whole-match ] | advanced-community-filter-number }
command to check information about routes matching a specified BGP community filter.
Run the display bgp routing-table peer ipv4-address received-routes [ active ]
[ statistics ] command to check information about routes received by a BGP device from
its peers.
Run the display bgp routing-table peer ipv4-address accepted-routes command to check
information about the routes that are received by a BGP device from a specified peer and
match the routing policy.
Configuring Basic BGP Functions
Configure automatic route aggregation.
1. Run:
system-view
The system view is displayed.
2. Run:
bgp as-number
The BGP view is displayed.
3. Run:
ipv4-family unicast
The IPv4 unicast address family view is displayed.
4. Run:
summary automatic
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
7 BGP Configuration
405